Improvement in sawing-machine



Waff,

LITHDGRAPHEH. WASNINGYON D C Stlnitnl 5 JABEZ K. BABCOCK, OFSHORTSVILLE, ASSIGNOR TO JOHN DOYLE,

' OF BRISTOL, NEW YORK.

Letters Patent No. 87,233, elated February 23, 1869.

IMPROVEMENT IN SAWING-MACHINE.

To all whom fit may concern:

Be it known that I, J Anna K. BABeocK, of Shortsville,in the lcounty ofOntario, and State of New York, assigner to JOHN DOYLE, of the town ofBristol, county and State aforesaid, have invented a certain new anduseful Machine for Sawing Wood; and I do hereby declare t-hat thefollowing is a full and exact description thereof, reference being hadto the accompanying drawings, making part of this specification, inwhich- Figurel is a plan of my improved machine.

Figure 2, an elevation of the same. l

lFigure 3, a diagram, showing the arrangement of the ratchets foradjusting and holding the pressurebar. Like letters of referenceindicate corresponding parts in all the figures.y l

My improvement is of that class designed for cutting fire-wood.

The invention consists in an improved arrangement of parts for clampingand holding the stick in place, and for elevating the saw therefrom whenthe stick is released; also in an improved method of connecting the sawWith the power, whereby a less sweep and-less space are required for thesaw to act.

In the drawings- A indicates the main frame;

B, the crank-shaft;

C. the balance-wheel; and

D, the saw.

These parts are all similar to those ordinarily employed.

I connect the saw-shank c with the balance-wheel in a peculiar manner.To this end, a pendent rockbar, E, is pivoted at l1, above thebalance-wheel, ektending downward, face to face with it, andhavingpivoted to the lower end the shank of the saw.

A slot, c, is formed in this rock-bar, in which rests a crank-pin, el,secured to the balance-wheel.

. The saw-shank is thus simply suspended by the rockbar, and rocks toand fro by means of the crank-pin.

'lhe action is'thus equal and uniform, and the sawblade has that convexor rounding cut over the log or stick that is necessary to make it cutrapidly and easily.

The weight of the saw is also removed from the balance-wheel, so thatthere is no unusual strain at any portion ofthe stroke.

Ordinarily the shank of the saw is either connected directly to thebalance-wheel itself, by which the weight comes thereon, or else it isconnected by a pitman, which requires much longitudinal space, andcreates a greater amount of friction.

Iavoid these difficulties by suspending thel sawshank, and making thecrank-pin move it forward and back.

The stick to be sawed is laid across the foot of the main frame, restingagainst the standards ff.

On the opposite side of the stick, a block, G, slides forward and back,on a way, g, and is made to clamp against the stick by means of apressure-bar, H, which is pivoted to it at h, and extends back, withinreach of the operator.

A t the rear end, this pressure-bar is armed with a horizontal ratchet,t', which engages at any height with a vertical ratchet, It, secured toone of the posts ofthe main frame.

The operation of this portion of the invention is as follows: f

The stick having been placed in the right position, the block G is movedup,'so as to clamp it between said block and the standards f f. The longend s ofthe lever is then raised, so as to bring the short end m overthe top ofthe stick, thereby clasping the latter on four V sides, sothat it is impossible for it to work loose or get away.

` When the proper pressure is brought to bear, the ratchets c' t' areengaged together, thereby retaining the pressure-bar in place. c

These ratchets have a special relation to each other in holding the bar,for t holds the horizontal pressure of the block G against thestick,while k holds rthe ver` tical pressure ofthe end, m, on top thestick.

This arrangement of the double ratchets, with the pressure-bar and blockbearing upon two sides of the stick, I claim as a novel feature of mymachine.

In rear of the sliding block G, and in line with it, is located a lever,I, pivoted at u, the lower end, o, being curved down, so as to be struckby the said block as it is drawn back, while the upper end is armed witha laterally-projecting pin, p, that rests under the said shank, asshown.

The object of this lever is to elevate the saw from the stick when thecutis made, which is accomplished by the slidiug-block striking thelever, and tilting it,

thereby throwing up the pin p, and the saw with it,l

as indicated by red lines, fig. 2.

What I claim as my invention, and desire to secure l. rIhe block G,sliding in ways g, and having pivoted thereto the pressure-bar H, whichis shouldered at one end, and provided with ratchet fi, at the otherend, when all the parts are constructed and operated as described. l

2. The lever I, pivoted at vuhaving a curve, o, at one, and a pin, p, atthe other end, in combination with the sliding block G, all the partsbeing operated in the manner described, for the purpose specified.

3. The arrangement of the slotted rocking-arm E, wrist-pin d, saw-shanka, saw D, block G, pressure-bar H, and pivoted lever I, as hereindescribed, and for the purpose set forth.

[n witness whereof, I have hereunto signed my name, in the presence oftwo subscribing witnesses.

JABEZ K. BABOOGK.-

-Wituessesz It. Oseroon,

H. S. FAmcHILD.

